C＃檢測所有窗口中的關鍵事件

Question

嘿，我有關鍵事件處理程序的一些問題。這是來源：

using System; 
     using System.Collections.Generic; 
     using System.ComponentModel; 
     using System.Data; 
     using System.Drawing; 
     using System.Linq; 
     using System.Text; 
     using System.Windows.Forms; 
     using System.Diagnostics; 
     using System.Threading; 

     namespace WindowsFormsApplication3 
     { 
      public partial class Form1 : Form 
      { 
       public Form1() 
       { 
        InitializeComponent(); 
       } 

       [System.Runtime.InteropServices.DllImport("user32.dll")] 
       public static extern void mouse_event(int dwFlags, int dx, int dy, int cButtons, int dwExtraInfo); 


     public const int MOUSEEVENTF_LEFTDOWN = 0x02; 
     public const int MOUSEEVENTF_LEFTUP = 0x04; 
     public const int MOUSEEVENTF_RIGHTDOWN = 0x08; 
     public const int MOUSEEVENTF_RIGHTUP = 0x10; 


       public void Form1_KeyPessed(object sender, KeyEventArgs e) 
       { 
        if (e.KeyCode == Keys.F2) 
        { 
         DrawSquare(); 
        } 
       } 

       public void DrawSquare() 
       { 
        int line = Convert.ToInt16(textBox1.Text); 
        int time = Convert.ToInt16(textBox2.Text); 

        int x = MousePosition.X; 
        int y = MousePosition.Y; 
        Cursor.Position = new Point(x - line/2, y - line/2); 
        mouse_event(MOUSEEVENTF_LEFTDOWN, x, y, 0, 0); 
        Thread.Sleep(time); 
        Cursor.Position = new Point(x - line/2, y + line/2); 
        Thread.Sleep(time); 
        Cursor.Position = new Point(x - line/2, y + line/2); 
        Thread.Sleep(time); 
        Cursor.Position = new Point(x + line/2, y - line/2); 
        Thread.Sleep(time); 
        Cursor.Position = new Point(x - line/2, y - line/2); 
        mouse_event(MOUSEEVENTF_LEFTUP, x, y, 0, 0); 
        Thread.Sleep(time); 
        Cursor.Position = new Point(x, y); 
       } 
      }  
     } 

現在它只繪製廣場，當我按F2在窗體中，但我希望它可以在所有窗口上工作。 我還需要什麼？ （這是有點完美形狀的自動抽屜）

Answer 1

如果您只想處理幾個組合鍵，則可以使用RegisterHotKey。如果您想檢測所有不同的按鍵事件，請使用the global hook as Paul suggested。

Answer 2

你需要一個全局鉤子。 http://www.codeproject.com/KB/cs/globalhook.aspx